Sciatic Nerve Conductivity is Impaired by Hamstring Strain Injuries

Abstract

The aim of this study was to assess sciatic nerve conductivity in athletes with a history of hamstring strain injuries. Twenty-seven athletes with a history of hamstring strain injuries were included in the injured group. The control group consisted of 16 uninjured participants. We measured the proximal and distal latencies and calculated the sciatic nerve conduction velocity to evaluate neuronal conductivity. The results were expressed as median values and interquartile ranges. Both proximal latency and distal latency of the injured limb in the injured group were significantly longer than those of the uninjured limb (p<0.05). The nerve conduction velocity of the injured limb in the injured group was significantly lower than that of the uninjured limb (p<0.05). There were no significant side-to-side differences in the control group. Sciatic nerve conductivity impairments may exist in athletes with a history of hamstring strain injuries.

Eccentric contraction–induced muscle damage in human flexor pollicis brevis is accompanied by impairment of motor nerve

“…19 We also investigated the MCV of the sciatic nerve in 27 athletes who had experienced hamstring strain injuries, observing significant delays in distal and proximal M-wave latencies and significantly lower MCV in the leg where the muscle strain occurred compared to the contralateral leg. 20 Taken together, these findings strongly suggest that MCV is impaired by muscle injuries such as ECC-induced injuries. However, since previous ECC model of the biceps brachii is difficult to measure MCV, so there is a need to clarify it using other ECC models.…”

“…The delay in M‐wave latency is known to contain both muscle nerve conduction velocity and excitation‐contraction (EC) coupling . We also investigated the MCV of the sciatic nerve in 27 athletes who had experienced hamstring strain injuries, observing significant delays in distal and proximal M‐wave latencies and significantly lower MCV in the leg where the muscle strain occurred compared to the contralateral leg . Taken together, these findings strongly suggest that MCV is impaired by muscle injuries such as ECC‐induced injuries.…”

“…Participants were examined in a quiet room with ambient temperature at 26‐28°C by the supine position. MCV of FPBM dominated by median nerve was assessed according to the instruction in the “Manual of Nerve Conduction Studies” and as described in our previous study . As shown in Figure A, MCV was measured by forearms, using electromyography.…”

“…MCV of FPBM dominated by median nerve was assessed according to the instruction in the "Manual of Nerve Conduction Studies" 27 and as described in our previous study. 18,20 As shown in Figure 3A, MCV was measured by forearms, using electromyography. Surface EMG signals were recorded from FPBM.…”

Repensar a Ciatalgia Perante Variação Anatómica Bilateral do Nervo Isquiático, com Origem Baixa e Divisão Alta: Importância Histórica, Anatómica e Clínica

“…As raízes (L4 -S3) que formam o nervo isquiático podem sofrer danos por factores variados: hérnia discal (compressão das raízes nervosas pelo disco intervertebral); espondilolistese (luxação dos corpos vertebrais que gera compressão das raízes nervosas); traumas mecânicos, 22,23 inflamação, 24 processo infeccioso ou tumoral, 25,26 respostas químico-irritativas exacerbadas, ou a hipótese clínica mais rara, de compressão isquiática por varicosidades glúteas. [27][28][29] O conhecimento dos aspectos morfológicos e do desenvolvimento embrio-fetal do nervo isquiático são importantes para a avaliação subjectiva (anamnese) e cinéticofuncional (por provas de função específicas para avaliação do nervo isquiático ou diagnóstico diferencial da síndrome do piriforme).…”